Omegon external T2 to 1.25″ adapter - optical length 30 mm
If your telescope or accessory has a T2 thread and you need to connect it to a standard 1.25″ eyepiece or camera, this Omegon adapter is exactly what you are looking for. A simple, reliable and well-thought-out solution for everyday use at the observatory and in the field.
Versatile use in amateur astronomy
The T2 to 1.25″ adapter covers a wide range of situations that amateur astronomers regularly encounter. It can be used to connect 1.25″ eyepieces or cameras to a standard T2 thread, but also as an intermediate element when assembling more complex optical configurations - for example when incorporating a filter wheel, an additional T2 adapter, or an off-axis guider for precise guiding during astrophotography. Since both the 1.25″ and T2 standards are among the most widely used in amateur astronomy, this adapter will become a universal tool in your equipment kit.
Design and optical properties
The adapter features a black anodized surface finish, which effectively minimizes unwanted light reflections inside the optical assembly. This is an important detail especially in astrophotography or when observing high-contrast objects. The optical length of 30 mm is fixed and must be included in the calculation of the total optical path of your setup - keep this in mind when planning the back-focus of your camera or when adjusting the focuser.
Key specifications
| Parameter |
Value |
| Connection type |
External T2 to 1.25″ |
| Optical length |
30 mm |
| Compatible standards |
T2, 1.25″ |
| Surface finish |
Black anodized |
About the Omegon brand
Omegon is a German brand with a long tradition in the field of astronomical accessories. Its emphasis on manufacturing precision, quality materials and thoughtful design makes it a popular choice among both beginners and experienced observers and astrophotographers. Omegon accessories are designed to work seamlessly with telescope systems from various manufacturers and across different standards - which is exactly what you expect from a quality adapter.
